#!/usr/bin/env python
# coding=utf-8
# Copyright(C) 2024. Huawei Technologies Co.,Ltd. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License

import os
import torch
import safetensors.torch

SAFETENSORS_EXTENSION = "safetensors"


def load_state_dict(model_path):
    name = os.path.basename(model_path).split('.')[-1] # get weights name
    if name == SAFETENSORS_EXTENSION: # diffuser model use same name
        return safetensors.torch.load_file(model_path, device="cpu") # first load on cpu
    else:
        # to support hf shard model weights
        return torch.load(model_path, map_location="cpu") # first load on cpu
